Ac loss reduction of multilayer superconducting power transmission cables by using narrow coated conductors

N. Amemiya, Q. Li, K. Ito, K. Takeuchi, T. Nakamura, T. Okuma

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The ac loss characteristics of coated conductors are dominated by the magnetic field component normal to their superconductor layer. Multilayer cables as well as monolayer cables consisting of 4 mm-wide coated conductors (named 4 mm cables) and those consisting of 2 mm-wide coated conductors (named 2 mm cables) were designed, and numerical electromagnetic field analyses were performed in their cross sections to calculate their ac losses. Trapezoidal lateral critical current density Jc distributions with shoulders as well as uniform ones were assumed in coated conductors for the analyses. The former models the degraded Jc near the edges of coated conductors. In the case of the monolayer, the calculated ac losses of the 2 mm cables were comparable to those of the 4 mm cables. In the cases of the multilayers, the calculated ac losses of the 2 mm cables were obviously less than those of the 4 mm cables. The degraded Jc near the edges of coated conductors more seriously affects the ac loss characteristics of the 2 mm cables than those of the 4 mm cables. However, even if we consider the influence of the degraded Jc near the edges of coated conductors, 2 mm-wide coated conductors are more profitable than 4 mm-wide coated conductors in multilayer cables from the viewpoint of ac loss reduction.
Original languageEnglish
Article number065013
Number of pages10
JournalSuperconductor Science & Technology
Volume24
Issue number6
DOIs
Publication statusPublished - 7 Apr 2011

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superconducting power transmission
Power transmission
cables
Multilayers
Cables
conductors
Monolayers
shoulders
Electromagnetic fields
Superconducting materials
density distribution

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Ac loss reduction of multilayer superconducting power transmission cables by using narrow coated conductors. / Amemiya, N.; Li, Q.; Ito, K.; Takeuchi, K.; Nakamura, T.; Okuma, T.

In: Superconductor Science & Technology, Vol. 24, No. 6, 065013, 07.04.2011.

Research output: Contribution to journalArticle

Amemiya, N. ; Li, Q. ; Ito, K. ; Takeuchi, K. ; Nakamura, T. ; Okuma, T. / Ac loss reduction of multilayer superconducting power transmission cables by using narrow coated conductors. In: Superconductor Science & Technology. 2011 ; Vol. 24, No. 6.
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